hey does anyone have any experience migrating an existing system and userbase to Kratos, and for a period of time running the legacy auth and Kratos in parallel (eg for old versions of a mobile app)? How did you deal with synchronising things like password changes in one system with the other?

we've used the kratos webhooks to handle synchronization between the legacy system and the new kratos auth, so that the data (password, identifiers and social accounts) is still up to date on both sides